Soup: place the chicken, onions, carrots, celery, parsnip, parsley and salt and pepper to taste in a Dutch oven or large saucepan. Add enough water to cover the ingredients, about 10 cups, and bring to a boil over high heat. After 15 minutes, skim off the foam, reduce the heat and simmer 1 hour, skimming the soup occasionally as it simmers.

Dumplings: combine the flour and baking powder; beat the egg yolks on high speed until light, 3 minutes.